/*
 * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.protocol.pcep.parser.object;

import static com.google.common.base.Preconditions.checkArgument;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import org.opendaylight.protocol.pcep.spi.CommonObjectParser;
import org.opendaylight.protocol.pcep.spi.ObjectSerializer;
import org.opendaylight.protocol.pcep.spi.ObjectUtil;
import org.opendaylight.protocol.pcep.spi.PCEPDeserializerException;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.Object;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.ObjectHeader;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.overload.object.Overload;
import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.pcep.types.rev181109.overload.object.OverloadBuilder;
import org.opendaylight.yangtools.yang.common.netty.ByteBufUtils;

public class PCEPOverloadObjectParser extends CommonObjectParser implements ObjectSerializer {
    private static final int CLASS = 27;
    private static final int TYPE = 1;
    private static final int RESERVED = 1;
    private static final int FLAGS = RESERVED;
    private static final int BODY_SIZE = RESERVED + FLAGS + Short.BYTES;

    public PCEPOverloadObjectParser() {
        super(CLASS, TYPE);
    }

    @Override
    public void serializeObject(final Object object, final ByteBuf buffer) {
        checkArgument(object instanceof Overload, "Wrong instance of PCEPObject. Passed %s. Needed OverloadObject.",
            object.getClass());
        final Overload overload = (Overload) object;
        final ByteBuf body = Unpooled.buffer(BODY_SIZE);
        body.writeZero(RESERVED + FLAGS);
        ByteBufUtils.writeOrZero(body, overload.getDuration());
        ObjectUtil.formatSubobject(TYPE, CLASS, object.getProcessingRule(), object.getIgnore(), body, buffer);
    }

    @Override
    public Object parseObject(final ObjectHeader header, final ByteBuf buffer) throws PCEPDeserializerException {
        checkArgument(buffer != null && buffer.isReadable(), "Array of bytes is mandatory. Can't be null or empty.");
        buffer.skipBytes(RESERVED + FLAGS);
        return new OverloadBuilder()
                .setDuration(ByteBufUtils.readUint16(buffer))
                .build();
    }
}